CN115379885A - Filter - Google Patents

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Publication number
CN115379885A
CN115379885A CN202180026509.1A CN202180026509A CN115379885A CN 115379885 A CN115379885 A CN 115379885A CN 202180026509 A CN202180026509 A CN 202180026509A CN 115379885 A CN115379885 A CN 115379885A
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CN
China
Prior art keywords
filter
antibacterial agent
melt
antibacterial
layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202180026509.1A
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Chinese (zh)
Inventor
文仙永
朴亨镐
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
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Publication date
Application filed by LG Electronics Inc filed Critical LG Electronics Inc
Publication of CN115379885A publication Critical patent/CN115379885A/en
Pending legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
    • A01N59/16—Heavy metals; Compounds thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
    • B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
    • B01J20/26—Synthetic macromolecular compounds
    • B01J20/262—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon to carbon unsaturated bonds, e.g. obtained by polycondensation
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A01N25/08—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing solids as carriers or diluents
    • A01N25/10—Macromolecular compounds
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A01N25/34—Shaped forms, e.g. sheets, not provided for in any other sub-group of this main group
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
    • A01N59/16—Heavy metals; Compounds thereof
    • A01N59/20—Copper
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/01—Deodorant compositions
    • A61L9/014—Deodorant compositions containing sorbent material, e.g. activated carbon
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/08—Filter cloth, i.e. woven, knitted or interlaced material
    • B01D39/083—Filter cloth, i.e. woven, knitted or interlaced material of organic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/1692—Other shaped material, e.g. perforated or porous sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0001—Making filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0002—Casings; Housings; Frame constructions
    • B01D46/0005—Mounting of filtering elements within casings, housings or frames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
    • B01D46/0028—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions provided with antibacterial or antifungal means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/4227—Manipulating filters or filter elements, e.g. handles or extracting tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
    • B01D46/62—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
    • B01D46/64—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series arranged concentrically or coaxially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
    • B01J20/0225—Compounds of Fe, Ru, Os, Co, Rh, Ir, Ni, Pd, Pt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
    • B01J20/0233—Compounds of Cu, Ag, Au
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2209/00—Aspects relating to disinfection, sterilisation or deodorisation of air
    • A61L2209/10—Apparatus features
    • A61L2209/14—Filtering means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2209/00—Aspects relating to disinfection, sterilisation or deodorisation of air
    • A61L2209/20—Method-related aspects
    • A61L2209/22—Treatment by sorption, e.g. absorption, adsorption, chemisorption, scrubbing, wet cleaning
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
    • A61L9/18—Radiation
    • A61L9/20—Ultraviolet radiation
    • A61L9/205—Ultraviolet radiation using a photocatalyst or photosensitiser
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B01D2239/0442—Antimicrobial, antibacterial, antifungal additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/0604—Arrangement of the fibres in the filtering material
    • B01D2239/0622—Melt-blown
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/065—More than one layer present in the filtering material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/065—More than one layer present in the filtering material
    • B01D2239/0668—The layers being joined by heat or melt-bonding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/10—Filtering material manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2273/00—Operation of filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2273/30—Means for generating a circulation of a fluid in a filtration system, e.g. using a pump or a fan
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2279/00—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses
    • B01D2279/65—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses for the sterilisation of air

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Zoology (AREA)
  • Pest Control & Pesticides (AREA)
  • Environmental Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Dentistry (AREA)
  • Wood Science & Technology (AREA)
  • Plant Pathology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Epidemiology (AREA)
  • Toxicology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Materials Engineering (AREA)
  • Textile Engineering (AREA)
  • Filtering Materials (AREA)

Abstract

The present invention relates to filters. The filter of the present invention comprises: a support layer; and a filter layer bonded to the support layer, the filter layer being formed by melt blowing (meltblow) a first base material including a thermoplastic resin and a first antibacterial agent including an antibacterial metal or an antibacterial metal oxide as a melt.

Description

Filter
Technical Field
The present invention relates to filters. In particular, the present invention relates to a filter manufactured using antibacterial fibers and applicable to an air purifier.
Background
An air purifier is a device for improving the quality of indoor air by purifying contaminated air in a room. Generally, an air purifier is provided with a filter for filtering fine-sized substances floating in air, such as fine dust, bacteria, viruses, and the like.
In recent filters, an antibacterial agent is added by dyeing, coating, or the like to suppress growth or survival of microorganisms in air passing through the filter.
However, the conventional methods of adding an antibacterial agent such as dyeing and coating methods have a risk of reducing antibacterial performance due to loss of the antibacterial agent caused by cleaning or abrasion of the filter.
Disclosure of Invention
Problems to be solved by the invention
The present invention is directed to solving the aforementioned problems and other problems.
Another object of the present invention may be to provide a filter capable of maintaining antibacterial performance at a predetermined level or more by preventing loss of an antibacterial agent due to cleaning, abrasion, or the like of the filter.
Another object of the present invention may be to provide a filter capable of preventing chemical substances harmful to a human body from being discharged from the filter.
Another object of the present invention may be to provide a filter which is manufactured by a melt-blowing method and can easily improve antibacterial performance by adjusting the content of an antibacterial agent.
Another object of the present invention may be to provide a filter capable of improving antibacterial performance and dust collecting performance together.
Technical scheme for solving problems
According to an aspect of the present invention for achieving the above objects, there is provided a filter including: a support layer (support layer); and a filter layer (filter layer) bonded to the support layer, the filter layer being formed by melt-blowing a first base material including a thermoplastic resin and a first antibacterial agent including an antibacterial metal or an antibacterial metal oxide as a melt.
In addition, according to another aspect of the present invention, the support layer may be formed by melt-blowing a second base material including a thermoplastic resin and a second antibacterial agent, which may include an antibacterial metal or an antibacterial metal oxide, as a melt.
In addition, according to another aspect of the present invention, the first antibacterial agent and the second antibacterial agent may be the same as each other.
In addition, according to another aspect of the present invention, the first antibacterial agent and the second antibacterial agent may be different from each other.
In addition, according to another aspect of the present invention, the content of the first antibacterial agent in the filter layer may be 0.1 to 5%.
In addition, according to another aspect of the present invention, the melt may have a melt index (melt index) of 400 to 900, based on a melt index (melt index) of 900 to 1200 of a comparative melt consisting of only the first base material under certain conditions.
In addition, according to another aspect of the present invention, the support layer 332 may include PP (polypropylene) or PET (polyethylene terephthalate) or PTFE (Polytetrafluoroethylene) or short fiber (staple fiber) or acrylic (acrylic).
In addition, according to another aspect of the present invention, the first base may include PET (polyethylene terephthalate) or PP (polypropylene) or PTFE (Polytetrafluoroethylene).
In addition, according to another aspect of the present invention, the metal may include silver (Ag) or gold (Au) or platinum (Pt), and the metal oxide may include zinc oxide (ZnO) or copper oxide (Cu) 2 O, cuO) or titanium dioxide (TiO) 2 )。
Further, according to another aspect of the present invention, the first antibacterial agent may be formed of master batch (master batch).
Effects of the invention
The filter of the present invention has the following effects.
According to at least one of the embodiments of the present invention, it is possible to provide a filter capable of maintaining antibacterial performance above a prescribed level by preventing the loss of the antibacterial agent due to cleaning or abrasion of the filter, or the like.
According to at least one of the embodiments of the present invention, it is possible to provide a filter capable of preventing chemicals harmful to a human body from being discharged from the filter.
According to at least one of the embodiments of the present invention, it is possible to provide a filter which is manufactured by a melt-blowing manner and can easily improve antibacterial performance by adjusting the content of an antibacterial agent.
Additional areas of applicability of the present invention will become apparent from the detailed description provided hereinafter. However, various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art, and it should be understood that the detailed description and specific embodiments, such as the preferred embodiments of the invention, are given by way of example only.
Drawings
Fig. 1 is a front view of an air purifier to which a filter of an embodiment of the present invention is applied.
Fig. 2 is a sectional view of the air cleaner shown in fig. 1.
Fig. 3 is a perspective view of a filter assembly provided with a filter according to an embodiment of the present invention.
Fig. 4 is an exploded perspective view of the filter assembly shown in fig. 3.
Fig. 5 is a perspective view of a portion of the filter assembly shown in fig. 3.
Fig. 6 is a diagram for explaining a melt-blowing method as a method for manufacturing a filter according to an embodiment of the present invention.
Fig. 7 is a graph showing the content of the antibacterial agent in the fibers of the filter of the embodiment of the invention.
Fig. 8 and 9 are tables for explaining the correlation between the antibacterial agent content and the antibacterial performance according to the melt index in the melt-blowing mode of the manufacturing method of the filter as an embodiment of the present invention.
Fig. 10 is a table for explaining the emission level of zinc oxide according to the manufacturing method of the filter according to the embodiment of the present invention.
Detailed Description
Hereinafter, embodiments disclosed in the present specification will be described in detail with reference to the drawings, and the same or similar components will be given the same reference numerals regardless of the figure number, and redundant description thereof will be omitted.
The suffixes "module" and "portion" for the constituent elements used in the following description are given or mixed only in consideration of the writing of the specification, and do not have meanings or actions distinguished from each other by themselves.
In describing the embodiments disclosed in the present specification, if it is determined that the detailed description of the related known art may obscure the gist of the embodiments disclosed in the present specification, the detailed description thereof will be omitted. In addition, the drawings are only for the purpose of assisting understanding of the embodiments disclosed in the present specification, and the technical idea disclosed in the present specification is not limited by the drawings, and should be understood to include all modifications, equivalents, and alternatives within the idea and technical scope of the present specification.
The terms "first", "second", and the like, including ordinal numbers, may be used to describe various elements, but the elements are not limited by the terms. The terms are used only for the purpose of distinguishing one constituent element from other constituent elements.
When a certain component is referred to as being "connected" or "coupled" to another component, it is to be understood that the component may be directly connected or coupled to the other component, but other components may be interposed therebetween. Conversely, when a component is referred to as being "directly connected" or "directly connected" to another component, it is to be understood that no other component is present therebetween.
Unless the context clearly dictates otherwise, expressions in the singular include expressions in the plural.
In the following description, even though the embodiments are described with reference to specific drawings, reference numerals that do not appear in the specific drawings may be mentioned as necessary, and in the case where the reference numerals appear in other drawings (in the other drawings), the reference numerals that do not appear in the specific drawings are used.
Referring to fig. 1, the air purifier 1 may include a base 10 and a housing 20. Here, the air cleaner 1 may be referred to as an air conditioner.
For example, the base 10 may be formed in a circular plate (circular plate) shape as a whole, and may support the remaining constituents of the air cleaner 1. For example, the housing 20 may be formed in a truncated cone shape as a whole.
The suction hole 21 may be formed in a portion of a side surface of the casing 20, and may supply indoor Air (Room Air) RA to the inside of the casing 20. For example, the suction hole 21 may be formed adjacent to the lower end of the casing 20 and along the circumference of the casing 20. In this case, the indoor air RA may flow in a horizontal direction and flow into the inside of the casing 20.
The discharge hole 22 (refer to fig. 2) may be formed in a portion of the top surface of the housing 20, and may supply Air (Supplying Air) SA purified while passing through the Air purifier 1 into the room. In this case, the supply air SA may flow in the vertical direction and be discharged to the outside of the housing 20.
Referring to fig. 2, the air purifier 1 may include a filter assembly 30 and a fan module 50. The filter assembly 30 is disposed inside the casing 20 adjacent to the suction hole 21, which will be described in detail later.
The fan module 50 may be disposed inside the housing 20 and may be located at an upper side of the filter assembly 30. The fan module 50 may be provided to the fan housing 40 fixed inside the outer case 20. The fan module 50 can generate a flow of air from the suction hole 21 to the discharge hole 22. At this time, air may flow into the fan module 50 through the inflow portion 41 of the fan housing 40.
Specifically, fan module 50 may include a hub 51, a shroud 52, blades 53, and a rotary motor 54. In this case, the hub 51 may be coupled to the rotation shaft 54a of the rotation motor 54, and the shield 52 may be disposed to be spaced apart from the hub 51. In addition, a plurality of blades 53 are provided between the hub 51 and the shroud 52 to rotate according to the power of the rotation motor 54 to generate a flow of air.
That is, the indoor air RA flowing in through the suction hole 21 may be purified while passing through the filter assembly 30 according to the operation of the rotation motor 54, and then may be supplied into the room as the supply air SA through the discharge hole 22 via the fan module 50.
The sound absorbing member 61 may be provided to a fixing base 62 fixed to the inside of the casing 20, and may be positioned on the air flow path 50a passing through the fan module 50. For example, the sound absorbing member 61 may be formed of a porous member made of a material such as resin, rubber, sponge, or urethane foam. In this case, the sound absorbing member 61 can reduce the flow noise generated by the air flowing through the air flow path 50 a.
The display portion D may be provided at an upper portion of the air purifier 1. For example, the display unit D may display operation information of the air purifier 1.
Referring to fig. 3, the filter assembly 30 may be formed in a cylindrical shape as a whole, and may be provided with an opening 30P at an inner side thereof. Among them, the opening 30P may be formed in the up-down direction. In this case, according to the operation of the rotary motor 54, the indoor air RA flowing in through the suction hole 21 (refer to fig. 2) can be purified while flowing from the outer circumferential surface to the inner circumferential surface of the filter assembly 30, and can flow upward through the opening 30P.
The frame 31 may be provided at the upper and lower ends of the filter assembly 30 and function as a support to maintain the filter assembly 30 in a cylindrical shape. The frame 31 may include: a first upper frame 31a provided at an upper end of the filter assembly 30; and a first lower frame 31b provided at a lower end of the filter assembly 30.
On the other hand, a strap (strap) 311 may be provided at one side of the first upper end frame 31 a. In this case, the user can pull out the filter assembly 30 from the housing 20 in the horizontal direction by grasping the band 311 and pulling it in the horizontal direction. Among them, the band 311 may be referred to as a handle.
Referring to fig. 4, the filter assembly 30 may include a first assembly 30a and a second assembly 30b. The first assembly 30a may form an external appearance of the filter assembly 30, and the second assembly 30b may be inserted into the inside of the first assembly 30 a. At this time, the opening 30P may be formed inside the second assembly 30b.
A first upper end frame 31a and a first lower end frame 31b may be provided at the upper and lower ends of the first assembly 30a, respectively. In this case, the first upper end frame 31a and the first lower end frame 31b may be formed in a ring shape as a whole.
The first filter 33 may be combined with the first upper and lower end frames 31a and 31b between the first upper and lower end frames 31a and 31b. Thereby, the first filter 33 can be supported by the first upper end frame 31a and the first lower end frame 31b while maintaining a cylindrical shape.
A second upper end frame 32a and a second lower end frame 32b may be provided at the upper and lower ends of the second assembly 30b, respectively. In this case, the second upper end frame 32a and the second lower end frame 32b may be formed in a ring shape as a whole. Further, the outer circumferential surface of the second upper end frame 32a may be opposite to the inner circumferential surface of the first upper end frame 31 a. In addition, the outer circumferential surface of the second lower end frame 32b may be opposite to the inner circumferential surface of the first lower end frame 31b.
The second filter 34 may be combined with the second upper and lower end frames 32a and 32b between the second upper and lower end frames 32a and 32b. Thereby, the second filter 34 can be supported by the second upper end frame 32a and the second lower end frame 32b while maintaining the cylindrical shape.
Referring to fig. 5, the first filter 33 may include a pre-filter 331 and hepa filters 332, 333.
The pre-filter 331 may be located at the outermost periphery of the first filter 33. The pre-filter 331 can filter animal hair, lint, hair, large dust, etc. For example, the pre-filter 331 may have a mesh (mesh) structure and be formed with a plurality of through-holes. On the other hand, the pre-filter 331 is provided to be separable from the first filter 33, and can be cleaned as necessary for reuse. For example, one end and the other end of the pre-filter 331 may be coupled in a velcro (velcro) manner in a circumferential direction of the first filter 33.
High efficiency particulate air filters (HEPA filters) 332, 333 may be located inside the pre-filter 331. Among them, HEPA is an abbreviation of High Efficiency Particulate Air. The hepa filters 332 and 333 can filter fine-sized substances such as fine dust, bacteria, and viruses. For example, HEPA filters 332, 333 may have a mesh structure and be formed with a plurality of through-holes. In particular, an antimicrobial agent may be added to the hepa filters 332 and 333 to inhibit the growth or survival of microorganisms in the air passing through the hepa filters 332 and 333, which will be described in detail later.
The second filter 34 may be a deodorizing filter 34. The deodorizing filter 34 may be located inside the hepa filters 332, 333. For example, a plurality of through holes may be formed in the deodorizing filter 34. For example, the deodorizing filter 34 is an activated carbon filter or a carbon filter, and can remove odor and/or harmful gas and the like contained in the air by a chemical adsorption method. Also, the deodorizing filter 34 may be coated with a photocatalyst activated by light. In this case, the deodorizing filter 34 may decompose harmful substances contained in the air by a photochemical reaction to remove odor.
Thus, the indoor air RA flowing in through the suction hole 21 (see fig. 2) can be purified by passing through the pre-filter 331, the high efficiency particulate air filters 332 and 333, and the deodorizing filter 34 in this order according to the operation of the rotary motor 54.
Referring to fig. 5 and 6, the hepa filters 332, 333 may include a support layer (support layer) 332 and a filter layer (filter layer) 333. On the other hand, although fig. 5 shows the support layer 332 outside the filter layer 333, the support layer 332 may be inside the filter layer 333, in contrast.
The support layer 332 may be combined with the first upper end frame 31a and the first lower end frame 31b between the first upper end frame 31a and the first lower end frame 31b. Thereby, the support layer 332 may be supported by the first upper end frame 31a and the first lower end frame 31b. For example, the support layer 332 may include PP (polypropylene) or PET (polyethylene terephthalate) or PTFE (Polytetrafluoroethylene) or short fiber (staple fiber) or acrylic (acrylic).
The filter layer 333 may be combined with the support layer 332 between the first upper end frame 31a and the first lower end frame 31b. Thus, the filter layer 333 may be supported by the support layer 332. For example, the filter layer 333 may be bonded to the support layer 332 using hot-melt adhesive (hot-melt adhesive). At this time, the thickness of the support layer 332 may be greater than that of the filter layer 333.
For example, the support layer 332 and the filter layer 333 may be formed in a corrugated shape in which peaks (ridges) and valleys (grooves) extending long in the up-down direction are alternately formed as a whole. That is, the support layer 332 and the filtration layer 333 may be formed in a shape pleated in the circumferential direction of the first filter 33. This increases the contact area with the air passing through the support layer 332 and the filter layer 333, and improves the air cleaning performance of the high efficiency particulate air filter 332, 333.
The composition of the filtration layer 333 may be formed at the same time as melt spinning. For example, the filter layer 333 may be manufactured by a melt blown (meltblow) method. Specifically, the molten polymer MP is spun through the nozzle Nz, and at this time, the molten polymer MP spun from the nozzle Nz is blown by high-temperature and high-speed air HA supplied to the tip of the nozzle Nz, whereby ultrafine fibers can be formed. The ultrafine fibers produced in this manner may be stacked or wound on a screen (screen) SC rotated by a motor (not shown).
The support layer 332 may be manufactured by melt spinning or melt blowing, similarly to the filter layer 333.
As described above, in the high efficiency particulate air filters 332 and 333 manufactured by the melt blowing method and having antibacterial performance, since the antibacterial agent is impregnated in the fibers, it is possible to prevent the loss of the antibacterial agent due to moisture contained in the air or abrasion of the filter, and to maintain the antibacterial performance at a predetermined level or more.
Referring to fig. 6 and 7, the filter layer 333 may include a base material 333a and an antibacterial agent 333b. That is, the base 333a and the antibacterial agent 333b are transferred to the nozzle Nz by an extruder (not shown) in a molten state, and spun from the nozzle Nz toward the screen SC, whereby the filtration layer 333 can be produced. Of these, the base material 333a may be referred to as a yarn or a fiber yarn before melt-spinning, and may be referred to as a fiber or an ultrafine fiber after melt-spinning. Further, the antibacterial agent 333b may be referred to as an additive.
The base material 333a may include a thermoplastic resin. For example, the base 333a may include PET (polyethylene terephthalate) or PP (polypropylene) or PTFE (Polytetrafluoroethylene). For example, the base 333a may be in a flake (chip) state prior to melting.
The antibacterial agent 333b may include an antibacterial metal or an antibacterial metal oxide. At this time, the metallic antibacterial agent 333b has (-) charge, while the dust generally has (+) charge, so that the dust collecting performance of the high efficiency particulate air filter 332, 333 can be improved. For example, the antibacterial metal may include silver (Ag) or gold (Au) or platinum (Pt). For example, the antibacterial metal oxide may include zinc oxide (ZnO) or copper oxide (Cu) 2 O, cuO) or titanium dioxide (TiO) 2 ). For example, the antibacterial agent 333b may be formed from powder (powder) or master batch (master batch) before melting.
Thus, the content of the antibacterial agent 333b in the filtration layer 333 manufactured by the melt-blowing manner can be adjusted according to the mixing ratio of the base material 333a and the antibacterial agent 333b. The content of the antibacterial agent 333b can be calculated based on the ratio of the fibers 333a of the filtration layer 333 and the antibacterial agent 333b impregnated in the fibers 333a measured or observed by a Scanning Electron Microscope (SEM) (see fig. 7).
That is, in the melt produced by the melt-blowing method into the filtration layer 333 in the ultrafine fiber form (see fig. 7 (a)), if the antibacterial agent 333b has a parts by weight with respect to 100 parts by weight of the base material 333a, the antibacterial agent 333b content of the filtration layer 333 can be 1% (see fig. 7 (b)). Further, in the melt of the filtration layer 333, if the antibacterial agent 333b has b parts by weight with respect to 100 parts by weight of the base material 333a, the antibacterial agent 333b content of the filtration layer 333 may be 3% (refer to (c) of fig. 7). In addition, in the melt of the filtration layer 333, if the antibacterial agent 333b has c parts by weight with respect to 100 parts by weight of the base material 333a, the antibacterial agent 333b content of the filtration layer 333 may be 5% (refer to (d) of fig. 7). Wherein b may be greater than a and c may be greater than b.
At this time, if the content of the antibacterial agent 333b is too low, the antibacterial performance of the filter may not be exerted, and if it is too high, the productivity of the filter may be lowered. That is, the content of the antibacterial agent 333b may preferably be 0.1 to 5%.
On the other hand, the support layer 332 may be manufactured by a melt-blowing method in the same manner as the filter layer 333 and may have an antibacterial property. At this time, both the support layer 332 and the filter layer 333 may include an antibacterial metal or an antibacterial metal oxide targeting the same target bacteria or microorganisms. Alternatively, the support layer 332 and the filter layer 333 may include an antibacterial metal or an antibacterial metal oxide targeting target bacteria or microorganisms different from each other.
Referring to fig. 8 and 9, the correlation between the content of the antibacterial agent (AM content) and the antibacterial performance may be different according to the Melt Index (MI). The melt index MI is a flow rate when the melt is extruded from the plunger under a predetermined condition (for example, a temperature condition), and is an index indicating the ease of flowing the melt. For example, the melt index MI may be in g/10min. Among them, the melt index MI can be referred to as melt flow index (melt flow index).
Specifically, under prescribed conditions, the melt index MI when the filter layer 333 is manufactured by the meltblown method using only the base material 333a may be 900 to 1200. In this case, if the melt index MI of the base material 333a and the antibacterial agent 333b in the form of master batch (master batch) when the filtration layer 333 is produced by melt-blowing under the same conditions is 400 to 900, medium fluidity can be corresponded, and if the melt index MI is 900 to 1500, high fluidity can be corresponded. Among them, it is understood that high fluidity is fluidity in which the fluidity of the melt is better than medium fluidity.
In addition, evaluation of antibacterial performance was performed according to ISO 20743 using Staphylococcus aureus (Staphylococcus aureus). That is, the antibacterial performance evaluation was performed by measuring the reduction rate or removal rate of staphylococcus aureus exposed for 18 hours at the filter layer 333 subjected to the antibacterial treatment and comparing it with a filter not subjected to the antibacterial treatment.
Referring to fig. 8, antibacterial performance according to the content of the antibacterial agent (AM content) at medium fluidity can be confirmed. That is, the reduction of staphylococcus aureus at 18 hours of exposure of the filter layer 333 having an antibacterial agent content of 1% was 85.69% (case 1) or 78.74% (case 2), exhibiting an Average (AVG) antibacterial performance of 82.21%. Further, the reduction of staphylococcus aureus at 18 hours of exposure of the filter layer 333 having an antibacterial agent content of 3% (case 1) was 94.68% (case 2) or 94.38% (case 2), exhibiting an Average (AVG) antibacterial performance of 94.53%. In addition, staphylococcus aureus decreased by 98.62% (case 1) or 99.48% (case 2) when the filter layer 333 having an antibacterial agent content of 5% was exposed for 18 hours, exhibiting an Average (AVG) antibacterial performance of 99.05%.
Referring to fig. 9, antibacterial performance according to the content of the antibacterial agent (AM content) at high fluidity can be confirmed. That is, the filter layer 333 having an antibacterial agent content of 1% shows a reduction of 98.28% (case 3) or 98.03% (case 4) of staphylococcus aureus after 18 hours of exposure, exhibiting an Average (AVG) of 98.15% antibacterial performance. Further, staphylococcus aureus was reduced by 99.16% (case 3) or 99.05% (case 4) after 18 hours of exposure of the filter layer 333 having an antibacterial agent content of 3%, exhibiting an Average (AVG) antibacterial performance of 99.10%. In addition, the reduction of staphylococcus aureus at 18 hours of exposure of the filter layer 333 having an antibacterial agent content of 5% (case 3) or 97.99% (case 4) exhibited an Average (AVG) antibacterial performance of 97.89%.
From this, it can be confirmed that, unlike high fluidity, at medium fluidity, there is a tendency that the antibacterial performance increases significantly as the antibacterial agent content (AM content) of the filter layer 333 increases. That is, it can be understood that the flowability in which a desired antibacterial performance is easily achieved by adjusting the antibacterial agent content of the filter layer 333 is medium flowability.
In addition, the foregoing may be equally applied to the support layer 332 that is manufactured by a melt-blown method and has antibacterial properties.
Referring to fig. 10, when the filter layer 333 having antibacterial properties is manufactured by a melt blowing method, it is possible to prevent emission of emission-limiting substances such as zinc oxide.
Specifically, at a temperature of 23.1 ℃ and a relative humidity of 46% rh, the filter layer manufactured by the coating method (i.e., the method in which the antibacterial agent is applied to the fibers) and having antibacterial properties discharges 10mg of zinc oxide, but conversely, the filter layer 333 manufactured by the melt blowing method (i.e., the method in which the antibacterial agent is impregnated into the fibers by spinning a melt of the antibacterial agent and yarns) and having antibacterial properties may not discharge zinc oxide.
Thus, the manufacture of the antibacterial filter layer 333 by the melt-blowing method can be advantageous in eliminating fear of chemical substances (chemophorbia) by a user.
The foregoing may be applied to the support layer 332 manufactured by a melt-blowing method and having antibacterial properties.
Any embodiments or other embodiments of the invention described in the foregoing are not mutually exclusive or different. The individual constituents or functions of any embodiment of the present invention or other embodiments described above may be mixed or combined.
For example, it is meant that a configuration illustrated in a specific embodiment and/or drawing and a configuration illustrated in another embodiment and/or drawing may be combined. That is, even if the combination between the components is not directly described, unless it is explicitly stated that the combination is not possible, it means that the combination is possible.
The above detailed description is not to be construed as limiting in all aspects, but rather as exemplary. The scope of the invention should be determined by reasonable interpretation of the appended claims and all change which comes within the equivalent scope of the invention are included in the scope of the invention.

Claims (10)

1. A filter, wherein,
the method comprises the following steps:
a support layer; and
a filter layer combined with the support layer,
the filter layer is formed by melt-blowing a first base material and a first antibacterial agent as a melt, the first base material includes a thermoplastic resin,
the first antimicrobial agent comprises an antimicrobial metal or antimicrobial metal oxide.
2. The filter according to claim 1, wherein,
the supporting layer is formed by melt-blowing a second base material and a second antibacterial agent as melts, the second base material comprises thermoplastic resin,
the second antimicrobial agent includes an antimicrobial metal or an antimicrobial metal oxide.
3. The filter according to claim 2, wherein,
the first antibacterial agent and the second antibacterial agent are the same as each other.
4. The filter according to claim 2, wherein,
the first antibacterial agent and the second antibacterial agent are different from each other.
5. The filter according to claim 1, wherein,
the content of the first antibacterial agent in the filter layer is 0.1-5%.
6. The filter according to claim 5, wherein,
the melt index of the melt is 400 to 900, based on 900 to 1200 of a comparative melt consisting of only the first base material under the specified conditions.
7. The filter according to claim 1, wherein,
the support layer (332) comprises PP or PET or PTFE or short fibers or acrylic.
8. The filter according to claim 1, wherein,
the first base material comprises PET or PP or PTFE.
9. The filter according to claim 1, wherein,
the metal comprises silver Ag or gold Au or platinum Pt,
the metal oxide comprises zinc oxide ZnO or cuprous oxide Cu 2 O or copper oxide CuO or titanium dioxide TiO 2 。
10. The filter according to claim 1, wherein,
the first antimicrobial agent is formed from a masterbatch.
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